APT broken in authentik lxc

[thieneret]

When I try to install something inside the container, apt always throws this error:

Traceback (most recent call last):
File "/usr/bin/apt-listchanges", line 29, in
import apt_pkg
ModuleNotFoundError: No module named 'apt_pkg'

I think the error is related to python.
Programs that do not depend on python work despite the error message, but programs that depend on python do not.